Sarah Michelle Gellar, 47, looks ageless in a white lace mini dress at the world premiere of her husband Freddie Prinze Jr.'s film The Girl in the Pool

Sarah Michelle Gellar looked ageless as she attended The Girl in the Pool world premiere screening in Los Angeles on Wednesday evening. 

The actress, 47, wore a stunning white lace mini dress by SHUSHU/TONG while posing for photos at the ALO HQ Screening Room. 

Stepping out to support the release of her husband Freddie Prinze Jr.'s latest thriller, she teamed her look with a pair of black stilettos. 

To top off her chic outfit, Sarah teamed her outfit with a small box handbag and styled her hair into tousled waves. 

Freddie, 48, who stars as the lead character Thomas in the film, opted for a smart bomber jacket and a pink T-shirt for the premiere.

Sarah Michelle Gellar, 47, looks ageless as she attends The Girl in the Pool world premiere screening in Los Angeles on Wednesday evening

Sarah Michelle Gellar, 47, looks ageless as she attends The Girl in the Pool world premiere screening in Los Angeles on Wednesday evening

The actress wore a stunning white lace mini dress while posing for photos at the ALO HQ Screening Room

The actress wore a stunning white lace mini dress while posing for photos at the ALO HQ Screening Room

The official trailer for the The Girl In The Pool dropped last month, and sees Freddie reunite with Monica Potter, 52, his co-star in the 2001 film Head Over Heels.

The I Know What You Did Last Summer star, 48, plays Thomas, a successful man married to Kristen (Potter) - but also engaging in an extramarital affair with a younger woman.

Thomas' mistress visits him at his home on his birthday, but things take a deadly turn when she is discovered dead by their pool. Panicked, Thomas hides her body in a trunk in the backyard - moments before his wife surprises him with a birthday party in their backyard.

The trailer captures a desperate Thomas attempting to keep the body hidden from guests at his home. 

The trailer begins with Thomas' mistress stopping by his home and stripping down into her underwear as they make out by the pool.

But things take a turn for the worse as his mistress is then seen laying on the floor, seemingly deceased, with blood streaked across her face and pooled up on the floor. 

It remains unclear how the woman died, but Thomas decides to hide her body. 

The panicked man is seen placing her body in a storage trunk in his backyard. 'I love you,' he says. 'But I have a family.'

Stepping out to support the release of her husband Freddie Prinze Jr.'s latest thriller, she teamed her look with a pair of black stilettos

Stepping out to support the release of her husband Freddie Prinze Jr.'s latest thriller, she teamed her look with a pair of black stilettos

To top off her chic outfit, Sarah teamed her outfit with a small box handbag and styled her hair into tousled waves
The dress featured black bow detailing

To top off her chic outfit, Sarah teamed her outfit with a small box handbag and styled her hair into tousled waves

Sarah flashed a big smile while waving to the cameras

Sarah flashed a big smile while waving to the cameras

Freddie, 48, who stars as the lead character Thomas in the film, opted for a smart bomber jacket and a pink T-shirt for the premiere, with the couple joining Rachael Leigh Cook

Freddie, 48, who stars as the lead character Thomas in the film, opted for a smart bomber jacket and a pink T-shirt for the premiere, with the couple joining Rachael Leigh Cook

Rachael and Sarah later joined Clare Grant (centre)

Rachael and Sarah later joined Clare Grant (centre)

Tyler Lawrence Gray, who plays Alex, was also in attendance

Tyler Lawrence Gray, who plays Alex, was also in attendance

The official trailer for the The Girl In The Pool dropped last month, and sees Freddie reunite with Monica Potter, 52, his co-star in the 2001 film Head Over Heels

The official trailer for the The Girl In The Pool dropped last month, and sees Freddie reunite with Monica Potter, 52, his co-star in the 2001 film Head Over Heels 

The I Know What You Did Last Summer star, 48, plays Thomas, a successful man married to Kristen (Potter) - but also engaging in an extramarital affair with a younger woman.

The I Know What You Did Last Summer star, 48, plays Thomas, a successful man married to Kristen (Potter) - but also engaging in an extramarital affair with a younger woman. 

But not long after the incident, he is surprised with a crowd of loved ones in his backyard by his wife. 

Despite his family being there for him, Thomas is anxious for the festivities to end. 'How much longer do we have to do this?' he asks his wife. 

'Why are you asking me that?' Kristen asks. 

In the bathroom, Thomas attempts to calm himself down, telling himself in the mirror, 'Just breathe, everything's going to be OK.' 

But his father-in-law, already suspicious of Thomas, overhears the conversation. 

'Were you talking to yourself or your mistress?' his father-in-law asks as Thomas emerges from the bathroom. 

Thomas' anxious behavior raises eyebrows from another guest at the party who tells him, 'I've been watching you all night looking over your shoulder.' 

An unexpected guest also arrives to the party - the man married to Thomas' mistress. 

The horror begins after his mistress arrives at his home on his birthday

The horror begins after his mistress arrives at his home on his birthday 

But things take a turn for the worse as his mistress is then seen laying on the floor, seemingly deceased, with blood streaked across her face and pooled up on the floor

But things take a turn for the worse as his mistress is then seen laying on the floor, seemingly deceased, with blood streaked across her face and pooled up on the floor 

Thomas hides her body in a trunk in his backyard

Thomas hides her body in a trunk in his backyard 

Potter and Prinze in the 2001 film Head Over Heels

Potter and Prinze in the 2001 film Head Over Heels 

The concerned husband tells Thomas and Kristen that he has been unable to find his wife, but her Uber account revealed she was last dropped off at Thomas' residence.

'The last location she came to was here but her phone keeps going to voicemail,' Kevin explains. 

Thomas returns to the chest where he placed his mistress and finds her phone, ringing with a phone call from Kevin. 

Fans will have to wait until July 26 to see how the thriller resolves.